Leviton® Power Pack, Super Duty, 277 VAC Input, 24 VDC Output, 50/60 Hz, 225 mA, 0.5 A Relay Rating, 0 to 50 deg C Operating, 0 to 90% Non-Condensing Humidity, 5 mA at 24 VDC Control Input, 3.811 in Width, 1.432 in Depth, 2.4 in Height, High Impact Plastic, Black